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UCD selected by reviewer
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Diagnosis X |
All other |
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| UCD selected by original coders |
Diagnosis X All other |
a c |
b d |
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| Agreement rate = (a+d)/(a+b+c+d) |
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| False positive rate = b/(a+b) |
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| False negative rate = c/(c+d) |
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| Kappa value = (Po – Pe)/(1 – Pe) |
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| Po = (a+d)/(a+b+c+d) |
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| Pe = ([a+c]/[a+b+c+d]) * ([a+b]/[a+b+c+d])+([b+d]/[a+b+c+d) * ([c+d]/[a+b+c+d]) |
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